Veritas Storage Foundation Intelligent Storage Provisioning 5.0.1 Administrators Guide, HP-UX 11i v3, First Edition, November 2009

About storage pool policies
A storage pool’s policies define how it behaves when more storage is required,
and when you try to create volumes whose capabilities are not permitted by the
current templates.
The following policies are associated with a storage pool:
■ AutoGrow defines how a storage pool uses LUNs. This policy can take the
following level values:
pool uses storage that has been manually assigned to the storage pool.
diskgroup uses storage that has been assigned to the disk group.
■ SelfSufficient defines how a storage pool uses templates. This policy can
take the following level values:
pool uses templates that have been manually assigned to the storage pool.
diskgroup uses templates that have been manually assigned to the disk group.
host uses any template that has been installed in the ISP configuration database
on this host.
The values of these policies can be combined to suit how the storage pool is to be
used.
The following default storage pool policy levels control how it manages its
templates and LUNs:
■ The default level of the AutoGrow policy is diskgroup. This allows LUNs that
are associated with the storage pool and its disk group to be used for allocating
storage to volumes.
■ For storage pools that are created explicitly by using the vxpool command,
the default level of the SelfSufficient policy is pool. This allows only
templates that are associated with the storage pool to be used for allocating
storage to volumes. The storage pool can contain only volumes with the
reliability and performance capabilities that are supported by these templates.
■ For storage pools that are created implicitly by specifying the -o intent option
to the vxassist make command when creating a volume, the default level of
the SelfSufficient policy is host. This allows any template that has been
installed in the ISP configuration database to be used.
LUNs in other storage pools or disk groups or outside any disk group are not
immediately available for aggregating into another storage pool or disk group.
Figure 1-12 illustrates the scope of the levels that can be configured as policy
values for a storage pool.
37Understanding ISP
About ISP concepts